From: Vivek Goyal <vgoyal@redhat.com>
Date: Mon, 27 Nov 2017 15:12:44 +0000 (-0500)
Subject: ovl: Pass ovl_get_nlink() parameters in right order
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=066f40dc495d5ab2ec9a871cb8703d9591d636c5;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

ovl: Pass ovl_get_nlink() parameters in right order

commit 08d8f8a5b094b66b29936e8751b4a818b8db1207 upstream.

Right now we seem to be passing index as "lowerdentry" and origin.dentry
as "upperdentry". IIUC, we should pass these parameters in reversed order
and this looks like a bug.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Amir Goldstein <amir73il@gmail.com>
Fixes: caf70cb2ba5d ("ovl: cleanup orphan index entries")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index bc6d5c5a3443..4bb7e4f53ea6 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -437,7 +437,7 @@ int ovl_verify_index(struct dentry *index, struct path *lowerstack,
 
 	/* Check if index is orphan and don't warn before cleaning it */
 	if (d_inode(index)->i_nlink == 1 &&
-	    ovl_get_nlink(index, origin.dentry, 0) == 0)
+	    ovl_get_nlink(origin.dentry, index, 0) == 0)
 		err = -ENOENT;
 
 	dput(origin.dentry);